{
  "manageEntity": {
    "action": "Save",
    "entityId": "1183966875",
    "entityType": "Track",
    "nonce": "0xb842f8be727d797f744646103705af693e4bebeebdea7924bf2b31ea48e302fc",
    "signature": "0xe84dd355830fda35132b874d63ca46d42bf21fa0c048adb2c6f5c6c7504647b756969b1b00fc2dbff11ca00a0a24bc2d85ae29908711cf229a1c297c6393631b1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}